{"as_of":"2026-11-06","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Model families","items":[{"count":5,"name":"Helicopter Transport Services CH-54","note":"","unit":"registered","url":"https://eflight.com/models/helicopter-transport-services/ch-54"}],"relation":"makes"},{"group":"Engines","items":[{"count":4,"name":"Pratt & Whitney JFTD12A-5A","note":"4800 hp","unit":"of these aircraft","url":"https://eflight.com/engines/pratt-whitney-jftd12a-5a"},{"count":1,"name":"Pratt & Whitney JFTD12A series","note":"4500 hp","unit":"of these aircraft","url":"https://eflight.com/engines/pratt-whitney-jftd12a-series"}],"relation":"powered by"},{"group":"Where they are","items":[{"count":5,"name":"Oregon","note":"","unit":"of these aircraft","url":"https://eflight.com/states/OR"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":3,"name":"U S Leaseco INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/u-s-leaseco-inc"},{"count":2,"name":"US Leaseco INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/us-leaseco-inc"}],"relation":"owned by"},{"group":"Record","items":[{"count":1,"name":"NTSB accidents and incidents involving Helicopter Transport Services aircraft","note":"as the NTSB spells the maker's name","unit":"cases since 1982","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"involved in"},{"group":"Analytics","items":[{"count":null,"name":"Biggest makers and model families","note":"","unit":"","url":"https://eflight.com/analytics/makers"},{"count":null,"name":"Accidents by model and by maker","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"compared in"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"id":"helicopter-transport-services","name":"Helicopter Transport Services","registered":5,"type":"maker","url":"https://eflight.com/makers/helicopter-transport-services"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}
